Relay.



No. 674,540. Patent-why 2l, lem.

F. D. PEARNE.

- RELAY.

(Application filed Dee. .11, 1900,)

(No Model.) 2-Sheets-Sheei l.

H dd/wgeger zzlffonjzys" No. 674,540. Patented May 2|, 190i.

F.y D. PEABNE.

RELAY.

(Application :neu me. 11, 1900K.)

2 Sheets-Sheet 2.

(No Model.)

Affargzys UNITED STATES PATENT OFFICE.

FRANK D. PEARNE, OF GRAND ISLAND, NEBRASKA.

RELAY.

SPECIFICATION forming part of Letters meenam. 674,540, dated May 21, 1901.

Application tiled December l1, 1900. Serial No. 39,580. (No model.)

To al?, whom t may concern.-

Be it known that l, FRANK D. PEARNE, a citizen of the United States, residing at Grand Island, in the county ofHall and State of Nebraska, have invented a new and useful Relay, of which the following is a specification.

This invention relates to relaysin general, and more particularly to that class including a plurality of pairs of contacts which are` adapted to be made and broken upon the movement of a polarized relay-armature.

The present relay is specially designed for.

Y use in connection with the typewriter-tele graph system forming the subject-matterr of a separate application for patent filed by me on the 11th day of December, 1900, Serial No. 39,577. This relay forms one of the line-relays, one object of the invention being to provide a construction wherein the varmature which makes and breaks the several circuits will be held delicately poised above the actuating-magnets and will be returned to normal position Without the use of springs, further objects and advantages of the invention being evident from the following description.

In the drawings forming a portion of vthis specification, and in which like characters of reference indicate similar parts in the several views, Figure 1 is a front elevation of therelay with the armature thereof in normal p0- sition. Fig. 2 is a side elevation of therelay with a portion of the field-magnet broken away to show the positions of two of the contacts. Fig. 3 is an elevation showing a modification including a different shape of fieldmagnet and a different arrangement of conta'cts.

Referring now to the drawings, the present relay comprises an insulating-base 5, upon which are4 mounted spaced supports 6 and 7, which hold the field-magnet 8 in an elevated position above the base. This field-magnet, as shown, is in the form of a bar 9, one end of which is bifurcated to form arms 10 and 1l, which are bent outwardly in opposite directions and in a common plane at right angles to the body of the bar, after which they are bent downwardly to lie parallel and are then bent toward each other to form the pole-pieces l2 and 13 of like polarity. Taking the upper end of the stem of the bar as a north pole,

lpiece is broken.

engaged with an insulating-bushing 24 in the (marked N,) then the two poles at the ends 'of the end portions of this bar are fixed contact-plates 17 and 1S for a purpose which will be presently explained. Y With this arrangement it will be noted that the lines of force from the north pole at the upper end of 'the 2body of the magnet will pass downwardly at both sides of the body to the stem 15 of thev armature.

They willA pass through the stem to the bar 14:, where they will divide and will pass longitudinally of the bar andy from the `ends of the bar to the poles 12 andl, there- `sult being that thearrnature will be held normally atv rest and with the axis of the ybar 14 coinciding with a line connecting the centers of the poles 12 and 13, the armature being held pivotally to prevent dropping thereof.

The pivotal mounting of the armature consists of a spindle 17', passed transversely through the bar at the base of the stem of the armaturaand. the ends of which spindle are tapered and Aare engaged in recesses in the ends of set-screws 18' and 19. The set-screw 18 is engaged with a post 20 at one side of the armature,and the set-screw 19 is engaged with a post 21 at the opposite side of the armature. The post 21 is continued above the set-screw and has an arm 22 at its upper end, which projects forwardly and over the upper end of the stem 15 of the armature. In this forwardly-projecting arm 22 is engaged a con-'V tact-screw 23, in position for normal contact by the contact-piece 16. When the armature is rocked, however, the contact-piece 16 is moved from engagement with the screw and a circuit including the screw and contact- The set-screw 19 is directly post 21, while screw 18 is engaged directly withthe post 20, which latter has a bindingpost 25 at its base .for engagement of a circuitwire.

The post 21 has also a binding-post 26 Y IOO engaged therewith for connection of a circuitwire, and when the armature is in normal position these two binding-posts 'are in circuit.

The posts 2'7 and 28 are mounted on the base 5, and the upper ends thereof extend forwardly and over the ends of the bar 14 of the armature and carry contact-screws 29 and 30, respectively, which are adapted for alternate contact by the contact-plates on the armature when the armature is rocked. The posts 27 and 28 are provided with binding-posts 31 and 32, respectively, for attachment of circuitwires. Th usv it 'will be seen that When vthe armature is rocked in onevdirection its contact with screw 23 is broken and contact with screw 29 is made and that when the'armature is rocked in an opposite direction from normal contact with screw 23V is broken and contact with screw 30 is made, throwing-the posts 26, 29, and v30alternately into ci rcuit with the post 25,' To thus .rock the armature, which is of course polarized by the action of the field-magnet;A an electromagnet is provided including the two spools r33 and34, having the pole-pieces 35 and 36. When currentis sent through the windings of Ihiselectromagnet in on'e'direction', one pole thereof is north and the other south, the north pole repelling the' i versed andthe opposite endsofl the armature are'attracted and repelled,causingthe'arma-V ture to rock inan opposite direction. When`v nocurrent flows, the armature standsin normal position, above` referred to.

- In Fig. s of the drawings autres shown a construction which-.is the same in all respects as that just described, withthe exception that the body-portion of thefleld-ma'gnet (shown at 40) is taken downwardly to lie between the arms'41 and 42. The armature 43 has the same construction, excepting that'the bar 44 thereof is longer than in the form'er instance to permit of placing'the'contact-plates 45 and 46 on the under sides-ofthe ends thereof beyond the spools of the electromagnetandfthe contact-screws47 and 48 are passed upwardly through the laterally-extending armsof the posts 49 and 50 for engagement by the'contacts when the armature isprocked. The operation is the same as in the former instance;

i A but by bringingthe poles of the eld-magnet in closerv proximity vthe'tield of force thereofy ing opposing like poles andan unlike pole ing opposing poles of like polarity and an unlike pole spaced therefrom, an armature comprising a member disposed to aline with the like poles and a member to project in the direction ofthe unlike pole, said armature being pivotally mountedand a bipolar-electromagnet disposed with its poles adjacent to theV I first member of the armature at opposite sides '8o 3. A relay comprising a field-magnet havv ofthe pivot of the latter, to rock the armature.

ing opposing like polesand an unlike pole equidistant from the like poles, an armature comprising a bar disposed in line with the like poles and a stem extending in thevdirection of the unlike pole, and means for rocking the` armature in the field of force of the magnet. i

4. A relay comprising a field-magnet having a divided fieldl of force, an armature including members disposed to approximately coincide with the axes of the divisions of the tield of force, and means for rocking the armature in the iield of force. Y

5. A relay comprising a field-magnet consisting' of a'body portion having one end bifurcated to'form like poles, the bifurcations being bent outwardly and then inwardly in axial alinement, an armature pivoted in the ield'of'` the magnet and including a bar in axial alinement with the like poles and a stem lyingin the direction of the opposite end of the body ofthe field-magnet, and means for rocking the armature in the eld of said magnet.

6. `A relay comprising a field-magnet having a divided field of `force, an armature including members disposed to approximately coincide With the'axes of the divisions of the field offorce, contacts'carried by the members of the armature additional contacts for engagement by the contacts upon the armature, and means for rocking the armature inv the field of the Held-magnet toengage its contacts. y y

7. A relay comprising a eld-magnet having a divided field of force, a pivoted armature including a main bar and a stem disposedV to approximately coincide with the axes of the field of force, a contact carried bythe stem, contacts carriedat the ends of the bar,

fixed contacts for engagement by the contactsv IOO Ilo I 

